Pipe-wrench



lF.` M. HAMILTON.

wf WRENCH APPLICATWN FILEDIJUNE 2-6, 1919- RENEWED AER- 15 1921;

Patented May, 31;`

F1757 Fig- 51% W/Zwwwj 'rife-WRENCH iie'rae'fsfuf i Y! To all provide a wrenchjwhichhas certainspeciic structural features hereinafter 'descriloed y,at Dayton, in the 4.and State' off; Chio',

more particular description Fig. l, and

. the movable jaw 'Be it knownfthat `I4`IEDRI`CKk M. H iirIL- United States,.residingr countyvv `*of lMo*I ltgomery has invented certain new i and' usefulv Improvement's'in Pipe-Vrenches,r v

TON, a citizen 'of the of whichthe following is a specification.

This invention improvements' in pipe wrenehes 'I`hefol )ject ofrthe said invention is to.V

Thel accompanying; drawings illustrate my improved wrench and rference thereto is now made in general terms preceding a to follow. Figure l is a plan view of the improved wrench. c Y i F ig.y 2 is a side elevation of the same. c

Fig. 3 is a plan viewv of a Somewhat modified form of thewrench. Fig. 4 is a side elevation of the construction shown in F ig; 3. Fig. 5 is a section on the-line 5 5 of Figs. l and 3.

Fig. 6 is a section on the line 6 6 of Fig. 7 is a section on the line 7 7 of Fis Y In the description to follow and in the drawings, similar reference 4characters indicate the same parts.

Referring in more particular terms to the said drawings, l represents the shank or main handle portion of the wrench which is provided with an extension Q forming one of the jaws of the wrench, to wit, the fixed jaw. The said fixed jaw 2 is provided with a roughenedA or serrated surface 3 which effectually grips the pipe held thereby. The points of the teeth or serrations 3 it will be observed point vinwardlyvto more properly engage the surface of the pipe heldV between the jaws. The handle` portion 1 of the lixed jaw is provided with side grooves 4 8 7. tends from the said handle portionv 5 and the end of the said shankvportion 'terminates in the movable jaw 8 The said shank character owing to a portion thereof being .Ii Specification ofLetters lati1t3-1 1 cutswayiomhei relatesto new and 'useful wrench'isjturnedl Y; lhe'l resultV the movable es; tir" vthe ii yis slidingly mounted land the said dog is 'enable the adjustment of the gagement with the teeth 10 ,dog is forced out against the tension of a l which f coil spring 5 form guides for the handle portion 5 of A shank 6 ex-V 6 is essentially of a resilientr de nXt ,tith' rik ofthe ,fixedjawg Byf f the materialin' diamanti@ a@ spa vided betweenthe .twofshanlf porti' and` which jper'rnitsftlie sha'nlrV to spring or flex inwardly when the count ofthe elastic ehara'ctf ing Shank .The VSe,erretionslof' af@ thereby' Caused.. t" i the surface lo`f' thelpipepl The present i although this is notY sential.

The two jaws 2 and angles to permit them to the pipe against 'the serrations of The/said jaw Xed jaw with added'cforce 8 yis moved relativelyf'to 2 by shifting portion 5 along the guides 4 thereby permitting the said movable jaw to be adjusted to any size pipe.V In order .to lock the said jaw 8 tions the following In Fig. 1 the handle vided "with a limited A number of lratchet teeth l0 which are adapted to lbe en -A gaged by a vertically sliding spring-controlled dog 1l The said dog l1 in guidesy l2- cut handle portion 5 means are: provided.'

in the sides ofthe knurled sides to facilitateits ready disengagement from the ratchet teeth l0 to movable jaw. This disengagement is effected by pressing outwardly the dog ll to free it from en- The saidy the tendency of which lis engagement between the ratchet teeth 10 frictionally bind against the face of the handle portion 1 of the wrench. 1 The c :estante-1s provided" a Vsimilar roughened or serratedv surwholly esare set at `v properly grip the vpipe and the resilient character of the movf Vable jaw to force further provided withy the handle f c ,se Y i 1n any ofl itsl set posiportion 5 is proico handle portion 5 i Y 75 Y the jaw the pipe held therein,

said member v-13- projects out of the handle portion f5- and may be rotated springcharaoter of the'V said movable` jaw becomes manifestv by coming Tinto .play to add additional' force on the pipe in its engagement with ythe vixed jaw'. ,Inthe form shown in Fig. 3 the outer end of thelresilientv shank .-6-,4 near the Jaw 8 1s provided with one or twoteeth are adapted to engage teeth '#15- on the shank oi' they fixed jawv when the resilient shank is flexed by the strain put upon V that point.

the'wrench.' The teeth -15 are located ad jacent tothe xedfjaw -2- on the handle portion v having the greatest amount of 'movement at By thus mounting the movable jaw on a resilient shank or support the wrench is adapted to rmly and with increasing `force `a` movable 3 and at this time theV fllbwhich -1- owing tothe movable jawAV grip and securely hold the pipe during the turning thereof.

Having described my invention, I claim: A pipe wrench having a handle portion with an extended `shank lterminated in a Vfixed jaw, the said handle portion having a longitudinal groove on each side thereot, 'aw member having a handle portion having a shank portion, a portion of which-extends over the sides of ,the handle portion of the -xed jaw member and is provided with guide ribs which extend into the grooves in the handle portion Vof the ixed j aw member, whereby the movable ljaw and handle are guided relatively to the fixed jaw and handle, the shank portion of said movablejawbeing reduced in thickness from the handle portion thereof to the j aw to impart resiliency thereto able jaw member vto flex in the manipulation of the wrench, and means, in the handle portion of the movable jaw engaging the handle portion 'of the fixed jaw and holding said parts' in locked position.

In testimony whereof I affix my signature.

VFREDRICK M. HAMILTON.

andpermit the lnovv 

